3.5.1 Unless expressly provided otherwise, when
cargoes which may emit toxic gases are carried, the cargo spaces shall
be provided with mechanical or natural ventilation; and, when cargoes
which may emit flammable gases are carried, the cargo spaces shall
be provided with mechanical ventilation.
3.5.2 If maintaining ventilation would endanger
the ship or the cargo, it may be interrupted unless this would produce
a risk of explosion.
3.5.3 When continuous ventilation is required
by the schedule for the cargo in this Code or by the cargo information
provided by the shipper, ventilation shall be maintained while the
cargo is on board, unless a situation develops where ventilation would
endanger the ship.
3.5.4 Ventilation openings shall be provided in holds
intended for the carriage of cargoes that require continuous ventilation. Such openings
shall comply with the requirements of the Load Line Convention, as amended, for openings
not fitted with means of closure.
3.5.5 Ventilation shall be such that any escaping
hazardous gases, vapours or dust cannot enter the accommodation or
other interior spaces in hazardous concentrations. Due consideration
shall be given to prevent escaping hazardous gases, vapours or dust
from reaching enclosed work areas. Adequate precautions shall be taken
to protect the personnel in these work areas.
3.5.6 When a cargo may heat spontaneously, ventilation
other than surface ventilation shall not be applied. On no account
shall air be directed into the body of the cargo.